GNU Social has always been, and will always be, readable and usable without JavaScript.

The prime directive

Modern looking, consistent and accessible UI across all browsers. Non-JS version as the primary focus, JS is optional and should be regarded as such.

‌https://www.gnusocial.rocks/v3/updates-interface-and-accessibility.html

• Optionally there will be some small use cases where JS makes sense (it's the only thing modern browsers understand e.e)
• For example, cropping your avatar before uploading a new one.
• This is the only example until now.